1
MHT CET (PCB) 2025 9th April Evening Shift
MCQ (Single Correct Answer)
+1
-0

In thermodynamic process, for free expansion, out of the following select the 'WRONG' statement.

A

Free expansion are adiabatic expansions and there is no exchange of heat between a system and its environment.

B

There is no work done on the system or by the system.

C

It is an instantaneous change, and the system is not in thermodynamic equilibrium

D

A free expansion can be plotted on a p-v diagram.

2
MHT CET (PCB) 2025 9th April Evening Shift
MCQ (Single Correct Answer)
+1
-0

The frequency of oscillation of LCR series circuit is ' $F$ '. The value of capacitance is tripled, then new frequency becomes ' xF '. The value of ' $x$ ' is

A

$\sqrt{3}$

B

$\frac{1}{\sqrt{3}}$

C

$\frac{1}{6}$

D

$\frac{1}{\sqrt{6}}$

3
MHT CET (PCB) 2025 9th April Evening Shift
MCQ (Single Correct Answer)
+1
-0

The heat required to increase the temperature from 373 K to 573 K at constant volume for ideal monoatomic gas of 2 moles is ( $R=$ universal gas constant)

A

900 R

B

$\quad 300 \mathrm{R}$

C

1200 R

D

600 R

4
MHT CET (PCB) 2025 9th April Evening Shift
MCQ (Single Correct Answer)
+1
-0

Two (A and B) pendulums begin to swing simultaneously. The first pendulum (A) makes five oscillations when the other (B) makes three oscillations. The ratio of the lengths of pendulum $A$ to that of $B$ is

A

$3: 5$

B

$9: 25$

C

$5: 3$

D

$2: 3$